Create UIColor object from ARGB value

Question

I've in a database a few rows where one field is ARGB value for the related color.

I've to read all the rows of these table and convert the ARGB value decimal to a UIColor.

I've googled finding this, but I didn't.

Is there any way to approach this?

Thanks.

Answer 1

text.color = [UIColor colorWithRed:10.0/255.0 green:100.0/255.0 blue:55.0/255.0 alpha:1];

You just need to divide the RGB values by 255 to get things to set up correctly.

Answer 2

Here's the method I came up with to convert an ARGB integer into a UI color. Tested it on several colors we have in our .NET system

+(UIColor *)colorFromARGB:(int)argb {
    int blue = argb & 0xff;
    int green = argb >> 8 & 0xff;
    int red = argb >> 16 & 0xff;
    int alpha = argb >> 24 & 0xff;

    return [UIColor colorWithRed:red/255.f green:green/255.f blue:blue/255.f alpha:alpha/255.f];
}

Answer 3

you can define a macro and use it throughout your code

#define UIColorFromARGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 \
blue:((float)(rgbValue & 0xFF))/255.0 alpha:((float)((rgbValue & 0xFF000000) >> 24))/255.0]